Uprooted from their comfortable home in Pennsylvania, James and Kate Tanner, along with their sons, Virgil and Andy, journey to the wild country of 1890s Wyoming to become farmers. Soon, they come face-to-face with tornadoes, bears and wolves. But through the hardships their love for each other endures, even when a local rancher sees the newcomers as "squatters" on his land, and will stop at nothing – including murder – to drive them out.